Improvement in thermo-machines for regulating dampers and ventilators



J. N. ADAMS.

AM. FIIOTO-LITHMIMHI/L 6'0- M )1 (05801711153 PROCESS) UNITED STATESPATENT OFFICE.

JAMES N. ADAMS, OF OLATHE, KANSAS.

IMPROVEMENT IN THERMO-MACH INES FOR REGULATING DAMPERS ANDVENl'lLATOFlS.

Specification forming part of Letters Patent No. 130,002, dated July 30,1872.

1'0 all whom it may concern:

.Be it known that I, JAMES N. ADAMS, of

. Olathe, Johnson county, State of Kansas, have invented a new andImproved Machine to Ohtain Power from Heat, or a Thermo-Machine;

i. and 1 do hereby declare the following is a clear, full, and exactdescription of it, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawingforming part of this specification.

This invention relates to a machine operated by changes of temperatureof a room or surrounding atmosphere, thereby opening or closing a commonstove-pipe damper or ventilator to govern the draft and heat of stovesor rooms; and consists of a frame, A, Figure 1, which should besubstantially made to support the various parts of the machine, and isconnected to an oscillating lever or crank,

B, of three arms by a screw acting as a fulcrum to the same, on which itshould move freely. On one of these arms is attached a weight, 0. To thevertical arm is attached the rod that moves the damper or ventilator.

To the other arm of the lever is hung, bya

metallic strip, a glass tube, E. This tube is bent at the upper end andhermetically sealed. Near this end is a bulb sufficiently large tocontain the required weight of mercury to move the damper or ventilator.I The lower end of the tube is immersed in mercury con- 7 v tamed 1n thevat F, as shown in the drawing.

The length of the tube must correspond to the temperature it .isrequired to keep. It

should be fifteen inches or more to maintain a temperature of '68Fahrenheit when using ether. 1

To further prepare the machine for use, the bent end of the tube must befilled with ether or some easily-volatilized liquid, the other portionof the tube to be filled with mercury, and in that condition immerse theopen end in the mercury-vat F to exclude the atmosphere.

To describe its operation, should the temperature be cold the mercurywill fill the space in the tube not occupied by the ether by atmosphericpressure. The weight'of mercury lowers the boiling-point of the ether inproportion toits height of column. Should the surrounding temperature beraised to that point or degree, the ether vaporizes, occupying more entThe combination with the frame A and the lever B, weight 0, with tube Eand mercuryvat F; also, the combination and use of the ether and mercuryor other fluid boiling at low temperature, all substantially asspecifled.

JAMES N. ADAMS. Witnesses:

M. V. B. PARKER, WM. J. SHAW, R. M. LOVELL.

